Method of scrambling PAL, SECAM and NTSC composite video signals and decoder of signals scrambled by this method
US5177485A · kind A · utility
3Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1991 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Jul 30, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/1693
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The method of the invention consists in shifting (a) the start of the scrambled section of a composite video line of a television image with respect to the start of the useful part of that line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.